gitweb: Add a feature to show side-by-side diff

diff --git a/setup.c b/setup.c
index ce87900ce3c68ace0f231827bdda0e9a65ef15b3..61c22e6becc1e49f1e92c916a4b8badd30a9cb2f 100644 (file)
--- a/setup.c
+++ b/setup.c
@@ -40,34 +40,6 @@ char *prefix_path(const char *prefix, int len, const char *path)
        return sanitized;
 }
 
-/*
- * Unlike prefix_path, this should be used if the named file does
- * not have to interact with index entry; i.e. name of a random file
- * on the filesystem.
- */
-const char *prefix_filename(const char *pfx, int pfx_len, const char *arg)
-{
-       static char path[PATH_MAX];
-#ifndef WIN32
-       if (!pfx_len || is_absolute_path(arg))
-               return arg;
-       memcpy(path, pfx, pfx_len);
-       strcpy(path + pfx_len, arg);
-#else
-       char *p;
-       /* don't add prefix to absolute paths, but still replace '\' by '/' */
-       if (is_absolute_path(arg))
-               pfx_len = 0;
-       else if (pfx_len)
-               memcpy(path, pfx, pfx_len);
-       strcpy(path + pfx_len, arg);
-       for (p = path + pfx_len; *p; p++)
-               if (*p == '\\')
-                       *p = '/';
-#endif
-       return path;
-}
-
 int check_filename(const char *prefix, const char *arg)
 {
        const char *name;
@@ -375,7 +347,7 @@ static int check_repository_format_gently(const char *gitdir, int *nongit_ok)
  * Try to read the location of the git directory from the .git file,
  * return path to git directory if found.
  */
-const char *read_gitfile_gently(const char *path)
+const char *read_gitfile(const char *path)
 {
        char *buf;
        char *dir;
@@ -437,7 +409,7 @@ static const char *setup_explicit_git_dir(const char *gitdirenv,
        if (PATH_MAX - 40 < strlen(gitdirenv))
                die("'$%s' too big", GIT_DIR_ENVIRONMENT);
 
-       gitfile = (char*)read_gitfile_gently(gitdirenv);
+       gitfile = (char*)read_gitfile(gitdirenv);
        if (gitfile) {
                gitfile = xstrdup(gitfile);
                gitdirenv = gitfile;
@@ -661,7 +633,7 @@ static const char *setup_git_directory_gently_1(int *nongit_ok)
        if (one_filesystem)
                current_device = get_device_or_die(".", NULL);
        for (;;) {
-               gitfile = (char*)read_gitfile_gently(DEFAULT_GIT_DIR_ENVIRONMENT);
+               gitfile = (char*)read_gitfile(DEFAULT_GIT_DIR_ENVIRONMENT);
                if (gitfile)
                        gitdirenv = gitfile = xstrdup(gitfile);
                else {
@@ -710,6 +682,11 @@ const char *setup_git_directory_gently(int *nongit_ok)
        const char *prefix;
 
        prefix = setup_git_directory_gently_1(nongit_ok);
+       if (prefix)
+               setenv("GIT_PREFIX", prefix, 1);
+       else
+               setenv("GIT_PREFIX", "", 1);
+
        if (startup_info) {
                startup_info->have_repository = !nongit_ok || !*nongit_ok;
                startup_info->prefix = prefix;
@@ -803,3 +780,10 @@ const char *setup_git_directory(void)
 {
        return setup_git_directory_gently(NULL);
 }
+
+const char *resolve_gitdir(const char *suspect)
+{
+       if (is_git_directory(suspect))
+               return suspect;
+       return read_gitfile(suspect);
+}